Legal

Terms of Service

1. General Provisions

1.1. These Terms of Service (hereinafter — "Terms") govern the relationship between the owner of the QSEN.RU website (hereinafter — "Administration") and any person accessing the website and using its services (hereinafter — "User").

1.2. The Terms constitute a public offer in accordance with Article 437 of the Civil Code of the Russian Federation. The acceptance of the offer is the User's actual use of the website.

1.3. The Administration reserves the right to modify these Terms at any time without prior notice to the User. The new version of the Terms takes effect from the moment it is posted on the Website, unless otherwise provided by the new version.

1.4. The User's use of the Website after the amendments come into Force constitutes acceptance of the new version of the Terms.

1.5. These Terms come into force upon publication and remain in effect indefinitely until withdrawn by the Administration.

2. Subject of the Agreement

2.1. These Terms define the procedure for using the services of the QSEN.RU website, including all tools, calculators, generators and other functionality (hereinafter — "Services").

2.2. The QSEN.RU website provides users with access to the following categories of services:

  • calculators (VAT, date difference, compound interest, mortgage, etc.);
  • generators (QR codes, passwords, random numbers, short links);
  • SEO analysis tools;
  • converters (amount in words, etc.);
  • informational materials (articles, guides).

2.3. All website services are provided free of charge and without registration.

3. Legal Status of Services

3.1. The QSEN.RU website services are informational and instrumental in nature. The results of calculations generated by the services (including VAT calculators, amounts in words, and other calculations) are for reference purposes only and do not constitute official documents.

3.2. The Administration is not responsible for the compliance of results obtained through the Services with the requirements of legislation, regulations, standards, or the User's contractual obligations.

3.3. The User is solely responsible for using the results obtained through the website's services for their purposes, including making decisions based on such results.

3.4. The Website services are not professional advice and do not replace qualified assistance from specialists. The User should not make significant decisions (financial, legal, medical, etc.) based solely on results obtained through the Website.

4. Terms of Service Use

5.1. To use the website's services, the User does not need to register, create an account, or provide personal data, except in cases of voluntary contact through the feedback form.

5.2. All calculations and result generation are performed on the User's browser side (client-side). The data entered by the User is not transmitted to the server and is not stored after the session ends.

5.3. The User agrees to:

  • use the Website and its services only for lawful purposes;
  • not use the Website for actions that violate the legislation of the Russian Federation or international norms;
  • not attempt unauthorized access to services, server equipment, or other users' data;
  • not use automated scripts, programs, or other means for mass access to the Website's services without written consent of the Administration;
  • not post links to materials containing prohibited information on the Website;
  • not use the Website for spreading spam, malware, or other actions that may disrupt the Website's operation or harm third parties;
  • not use the Website for automated data collection, including content parsing, without written consent of the Administration;
  • not reverse engineer, decompile, or disassemble the Website.

5. Changes and Termination of Service

6.1. The Administration reserves the right at any time and without prior notice to:

  • change the composition, functionality, and conditions of the Services;
  • suspend or terminate the operation of individual Services or the Website as a whole;
  • update, modify, or delete any content on the Website;
  • change the appearance, design, and structure of the Website.

6.2. The Administration is not liable for any damages incurred by the User as a result of actions specified in clause 6.1 of these Terms.

6. Intellectual Property

7.1. All design elements, texts, graphic images, logos, trademarks, and other intellectual property objects placed on the Website are the property of the Administration or are used by it legally.

7.2. Copying, reproduction, distribution, modification, or other use of the Website's elements without the written permission of the Administration is prohibited.

7.3. The User retains rights to the data (input information) that they enter to obtain results through the Website's services.

7. Limitation of Liability

8.1. The Website and its services are provided "as is" without any warranties, express or implied.

8.2. The Administration does not guarantee:

  • uninterrupted operation of the Website and its services;
  • absence of errors or inaccuracies in the services;
  • the User achieving expected results when using the services;
  • the suitability of services for the User's specific purposes or tasks;
  • availability of the Website at any specific time or from any specific geographical location.

8.3. The Administration is not liable for:

  • any damages (direct, indirect, incidental, punitive damages, lost profits) incurred by the User as a result of using or inability to use the Website;
  • actions of third parties, including other Users;
  • unauthorized access to the User's data, if such access resulted from the User's own actions;
  • the performance of external services or APIs that the Website may access to perform certain functions;
  • damages resulting from viruses, hacker attacks, equipment failures, or other technical issues.

8.4. The maximum aggregate liability of the Administration to the User is limited to 1000 (one thousand) rubles.

8. Indemnification

9.1. The User agrees to indemnify the Administration and related parties for any damages, claims, demands, losses, and expenses (including reasonable legal fees) arising from:

  • the User's violation of these Terms;
  • the User's use of the Website in violation of the law;
  • the User's actions that resulted in the violation of third parties' rights.

9. External Links and Third-Party Services

10.1. The Website may contain links to external Internet resources belonging to third parties. Such links are provided solely for the User's convenience.

10.2. The Administration is not responsible for the content, privacy policy, terms of use, or actions of the owners of external Internet resources.

10.3. The decision to go to external resources and use their services is made by the User independently and at their own risk.

10. Use of Cookies and Trackers

11.1. The Website uses cookies in accordance with the Privacy Policy available at Privacy Policy.

11.2. By using the Website, the User consents to the processing of cookies in accordance with these Terms and the Privacy Policy.

11.3. Third-party web analytics services may be used to collect Website visit statistics and analyze usage. Detailed information about their operation principles and processed data is provided in the Privacy Policy.

11. Notices and Communication

12.1. All notices to the User are considered delivered from the moment they are posted on the Website.

12.2. The User may contact the Administration through the feedback form on the Website at QSEN.RU/feedback.

12.3. The Administration agrees to review the User's request within 30 (thirty) calendar days from the date of receipt.

12. Non-Assignability

13.1. The User may not assign their rights and obligations under these Terms to third parties without the written consent of the Administration.

13.2. The Administration may assign its rights and obligations under these Terms to any third party without the User's consent by notifying them through posting information on the Website.

13. Applicable Law and Dispute Resolution

14.1. These Terms are governed by and construed in accordance with the laws of the Russian Federation.

14.2. All disputes arising from the relations governed by these Terms are resolved through negotiations. The response time to a claim is 30 (thirty) calendar days from the date of its receipt.

14.3. If a dispute cannot be resolved through negotiations, it is referred to the court at the Administration's location in accordance with the procedural legislation of the Russian Federation.

14. Final Provisions

15.1. If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions remain in full force and effect.

15.2. The Administration's failure to exercise its rights under these Terms does not mean waiver of those rights.

15.3. The Administration reserves all rights not expressly granted to the User under these Terms.

15.4. All issues not regulated by these Terms are resolved in accordance with the legislation of the Russian Federation.

15. Administration Details

Website: QSEN.RU

Contact email: feedback form on the website

Publication date: April 24, 2026